A child is accidentally given oral hydrocortisone tablets. What is the most likely immediate side effect?

Correct option is B

Single oral ingestion of hydrocortisone may cause GI irritation (nausea, vomiting, abdominal pain), but life-threatening effects occur with chronic or very high dose exposure.
Explanation of options: (a) ✘ Cortisol increases glucose, not hypoglycemia. (b) ✔ Correct; most common effect = GI upset. (c) ✘ Seizures not typical of steroid ingestion. (d) ✘ Shock occurs with steroid withdrawal, not ingestion.